Get replay working from dropdown menu. (right now everyone has the replay button. We will hide it for most cases later on)

EduNetworkBuilder/Network.cs

@@ -81,6 +81,10 @@ namespace EduNetworkBuilder
 
         private List<AnimationClass> Animations = new List<AnimationClass>();
 
+        public bool ReplayInProgress = false;
+        public DateTime NextReplayAction = DateTime.UtcNow;
+        public int NextReplayIndex = -1;
+
         /// <summary>
         /// WhatFrom: If we are launched from a homework, we remember it here.
         /// </summary>
@@ -1642,6 +1646,28 @@ namespace EduNetworkBuilder
                     }
                 }
             }
+            if(ReplayInProgress && myPackets.Count == 0)
+            {
+                if(DateTime.UtcNow >= NextReplayAction)
+                {
+                    //We are doing a replay and enough time has passed from the last replay...
+                    NBSettings Settings = NB.GetSettings();
+                    ActionCollection AC = Settings.GetUserActionCollection();
+                    bool Success = AC.RunAction(NextReplayIndex++);
+                    
+                    NextReplayAction = DateTime.UtcNow.AddMilliseconds(NB.MillisecondsBetweenReplays);
+                    if(Success)
+                    {
+                        //we did something.  keep replaying
+                        NB.MarkToUpdate();
+                    }
+                    else
+                    {
+                        //replay finished
+                        ReplayInProgress = false;
+                    }
+                }
+            }
             //if (myPackets.Count > 50)
                 //Console.WriteLine("Packets: " + myPackets.Count.ToString());
             if (myPackets.Count > 0)